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# Copyright 2013-2021 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

from os import symlink

from spack import *


class Homer(Package):
    """Software for motif discovery and next generation sequencing analysis"""

    homepage = "http://homer.ucsd.edu/homer"
    url      = "http://homer.ucsd.edu/homer/data/software/homer.v4.9.1.zip"

    version('4.9.1', sha256='ad1303b0b0400dc8a88dbeae1ee03a94631977b751a3d335326c4febf0eec3a9')

    depends_on('perl', type=('build', 'run'))
    depends_on('r-biocgenerics', type='run')
    depends_on('r-biocparallel', type='run')
    depends_on('r-edger', type='run')
    depends_on('r-deseq2', type='run')

    variant('data', default=False,
            description='Download genome data packages')

    def install(self, spec, prefix):
        # initialize homer directories
        basedir = join_path(prefix.lib, 'homer')
        mkdirp(basedir)

        install_tree('.', basedir)

        # symlink bin so it is included in the PATH
        symlink(join_path(basedir, 'bin'), prefix.bin)

        # override homer base directory in configure script
        filter_file('my $homeDir = $1;',
                    'my $homeDir = \"{0}\";'.format(basedir),
                    'configureHomer.pl', string=True)

        # compile/prepare binaries and perl scripts with the correct paths
        perl = which('perl')
        perl('configureHomer.pl', '-local')

        # download extra data if requested
        if '+data' in spec:
            perl('configureHomer.pl', '-install', '-all')